Demciflex dust filters

I just got 3 custom made dust filters from Demciflex. These custom dust filters were reasonable priced and folks at Demciflex were accomodating to work with. They can pretty much create a custom filter in any configuration imaginable. They made these filters for me based on my own CAD drawings. Nonetheless, I am very pleased with the end products. Contact Demciflex if you need anything. :up:

http://usera.ImageCave.com/mingbogo/PC/IMG_1989.JPG

http://usera.ImageCave.com/mingbogo/PC/IMG_1995.JPG

http://www.demcifilter.com/

O shizat! THey'll make them custom!? I want one giant filter to cover all 9 fans on my mountainmods case! I bought 1 smaller one to try them out, and the work well, but their outside diameter was just a little too big to fit filters on all of my fans :P

Just call them up and ask for a custom order or what?

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Originally Posted by josh1980

O shizat! THey'll make them custom!? I want one giant filter to cover all 9 fans on my mountainmods case! I bought 1 smaller one to try them out, and the work well, but their outside diameter was just a little too big to fit filters on all of my fans :P

Just call them up and ask for a custom order or what?

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Go to their website per the link I posted earlier and just email them with a short description of what you need. They were very responsive with email so be prepare get things started. Good luck!

Yeah DEMCIFlex seems like a good manufacturer. I emailed them asking if they could sell just one of the 3 filters that come as a set for the HAF 932 (only the bottom one is needed for the HAF X). They replied promptly and courteously saying they could sell it for $8 w/ shipping included to the US, and they're way down in friggin So Africa! I call that pretty good pricing and service. Only thing I worry about is the durability of the mesh material itself, which is polyester as far as I recall. Polyester doesn't absorb moisture, but it's not exactly known as a durable fiber.

They should make also custom filter for Mo-Ra3, if we are speaking about 9 fans :)

Crap man...I asked them for the same HAFX bottom filter and he is charging me USD 12....plus shipping...wonder why the differential pricing

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Originally Posted by Frag Maniac

Yeah DEMCIFlex seems like a good manufacturer. I emailed them asking if they could sell just one of the 3 filters that come as a set for the HAF 932 (only the bottom one is needed for the HAF X). They replied promptly and courteously saying they could sell it for $8 w/ shipping included to the US, and they're way down in friggin So Africa! I call that pretty good pricing and service. Only thing I worry about is the durability of the mesh material itself, which is polyester as far as I recall. Polyester doesn't absorb moisture, but it's not exactly known as a durable fiber.

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Yeah I was a little concerned about the durability of the material but after doing a little bit of unscientific testing with a small filter for the 120mm fan that you can get at retail, I was more confident with it more than ever. I have tried to fold, tear, and stretch it, of course without excessive force, and it seems to be just as tough as my t-shirt. I have also tried to vacuum it, as I thought it would be suck into the cleaner but it stays put without a slight movement. The only thing I have not tried is to wash it but I don’t think it will be a problem, especially since it can be vacuumed. Just like anything else, if you do not abuse it then it should last quite while.

Yeah they are in South Africa, which costs a bit more for shipping but nothing more than any other place across the pond.

mingbogo: Out of curiosity/for example, what size/specifics (eg. biggest one looks like with different frame type) your filters are and how much they costed to you? Also in what CAD format you sent drawings to them (wondering in what would be the simpliest to make such myself)?

churchy: The biggest one is 21" x 8". This one looks different than the others is because it is magnetic on both sides while the other two have magnet on one side with a finishing material on the other. The other filters are for a 420mm rad and a 360mm rad, respectively. I do not remember the exact cost off hand but I believe that the biggest filter was around $35(USD) and the other two were around $27 each. I do all my mechanical design in SolidWorks so naturally I did send them my SolidWorks files. However, it does not have to be a CAD file, as they can work off on any drawing be it in JPG or PDF, just as long as it has dimensions on it. You can even draw it manually on a piece of paper with a ruler and a pencil and somehow take a photo or scan it to email them. Like I said before, they are very flexible to work with so use whatever method you like to convey your custom filter dimensions to them.

Here is one of the 2D drawings that I sent them:

http://usera.ImageCave.com/mingbogo/PC/140%20filter.JPG

Hmm, to me they said, that preferably some vector format. Hmm, from free tools, probably only Sketchup will fit the bill. Eek, dislike learning new things for one-time task. :)

churchy: I can draw it up for you in SolidWorks if you like.

mingbogo: Thanks, but no hurry, as i have yet to recieve radgrill. No sense to start drawing something, if i cannot get hold on template, so only way to get eg. screw hole measurements is by measuring radgrill IRL. In shop item entry description only outside dimensions are specified.
BTW, why so big screwholes in radgrills of yours? So that heads of mounting screws for fans/rads above surface won't hinder filter placement?

churchy: You correct that those holes were made big for clearance, as these are magnetic filters so they will stick to a metal surface without being screwed down.

Just ordered my HAF932 set today... cant wait, im so sick of the dust buildup in that case.

Funkwagen: remember though that for proper dust protection you need two things - dust filters on all fans blowing in (no need to reduce airflow with filters on fans blowing out), and positive pressure (in other words more air blown in then blown out) to not suck unfiltered air & dust through mirriads of gaps in case parts or between devices or different cut outs/holes/meshes.

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Originally Posted by churchy

Funkwagen: remember though that for proper dust protection you need two things - dust filters on all fans blowing in (no need to reduce airflow with filters on fans blowing out), and positive pressure (in other words more air blown in then blown out) to not suck unfiltered air & dust through mirriads of gaps in case parts or between devices or different cut outs/holes/meshes.

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Oh believe me I've made sure I've got positive pressure haha. At the moment the only things keeping me from having to clean the case out every week is a couple nylons stretched over two intake fans and the positive pressure

Well the thing about positive pressure in a PC case is that it is very tricky to determine, as it is more than just the number of input fans vs. the number of output fans. Most of us just eyeball it and call it accordingly. I think we need to add all the vents (a lot more than you think) in a case and calculate the rate of venting vs. the rate of air blowing in. To be honest, I am not sure exactly how to do that by calculations, but I think it can be determined with a pressure chamber.

Funkwagen: I hope you will like your Demcifilters!

Funkwagen: there can be another "gotcha" with TOO positive or too negative pressure - as in such configurations fans work extra hard to pressurise or vacuumise air in case, resulting in extra loss of airflow and cooling efficiency. Imho best is to have "slightly" positive pressure. It's not as simple as having one less fan blowing out then fans blowing in though, as one has to take into account that dust filters themselves (on fans blowing in) are resistive and hinder airflow. I'd say rather something like ammount of fans blowing out 1/3rd more then ammount of fans blowing in. One can check what resulting air pressure in case is by using something like lighter flame or smoke near some mesh/cutout/hole at case - if that flame/smoke gets pushed off case (positive) or sucked in (negative).
It's interesting to see how many case vendors wrongly implement dust protection. Eg. have dust filters on few fans, but clearly negative pressure fan direction balance overall + mirriads of meshes/cutouts in case back/walls where because of negative pressure dust unfiltered air gets sucked in instead of being sucked in just through dust filters.
EDIT
mingbogo: see above how resulting airpressure can be "tested" without calculating/tools :)

Quote:

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Originally Posted by churchy

Funkwagen: there can be another "gotcha" with TOO positive or too negative pressure - as in such configurations fans work extra hard to pressurise or vacuumise air in case, resulting in extra loss of airflow and cooling efficiency. Imho best is to have "slightly" positive pressure. It's not as simple as having one less fan blowing out then fans blowing in though, as one has to take into account that dust filters themselves (on fans blowing in) are resistive and hinder airflow. I'd say rather something like ammount of fans blowing out 1/3rd more then ammount of fans blowing in. One can check what resulting air pressure in case is by using something like lighter flame or smoke near some mesh/cutout/hole at case - if that flame/smoke gets pushed off case (positive) or sucked in (negative).
It's interesting to see how many case vendors wrongly implement dust protection. Eg. have dust filters on few fans, but clearly negative pressure fan direction balance overall + mirriads of meshes/cutouts in case back/walls where because of negative pressure dust unfiltered air gets sucked in instead of being sucked in just through dust filters.
EDIT
mingbogo: see above how resulting airpressure can be "tested" without calculating/tools :)

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Actually, my atcs has a problem with this. I can see smoke being drawn into crevices and such.

That being said, I also ordered a demciflex standard 120mm filter for the back of the atcs too, hopefully reversing the flow of the rear fan may help the situation a little. Right now its massively negative airflow. (2x230mm fans + 120mm fan exhaust, vs 2x120mm fan and 1x230mm fan intake.)
Either way the demcifilters are def going to help the HAF. Right now no matter the fan config im finding it impossible to keep clean.

Got my demcifilters for my HAF :) Very impressed, I'm probably going to be getting more for my ATCS (to replace its built in front intake filter...finer material on the demci) and HTPC :)

Good news Funkwagen! I am impressed with mine, as they have been catching quite a bit of dust every week. I can't imagine those dust particles getting in the case!:up: